Cast Iron Weight Calculator

Gray cast iron has a density of approximately 450 lb/ft³ (7.2 g/cm³). This can vary slightly based on the specific alloy composition and carbon content, but 450 lb/ft³ is the standard engineering value used for calculations.

Multiply length × width × height to get volume, then multiply by the density (450 lb/ft³). Make sure all dimensions are in the same units. For example, a 1 ft³ piece of cast iron weighs 450 pounds.

Yes, ductile (nodular) cast iron is slightly less dense at about 438-443 lb/ft³ compared to gray cast iron at 450 lb/ft³. The difference is small but can matter for precision engineering applications.

Cast iron contains 2-4% carbon and is primarily composed of iron, one of the densest common metals. Its high carbon content actually makes it slightly less dense than pure steel (490 lb/ft³), but it's still much heavier than aluminum or plastics.

Cast iron is used for engine blocks, machine tool bases, cookware, pipes, manhole covers, and architectural elements. Its excellent vibration damping, wear resistance, and low cost make it ideal for heavy-duty applications where weight isn't a disadvantage.